Improvement in loom-picking mechanisms



E. W. MUFFATT.

Loom Picking Mechanism.

No. 134,153. Patented Den-24,1872.

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ELIJAH W. MOFFATT, OF HYDE PARK, MASSACHUSETTS, ASSIGNOR TO HIMSELFANDJOHN S. BLEAKIE, OF SAME PLACE.

IMPROVEMENT IN LOOM-PICKING MECHANISMS.

Specification forming part of Letters Patent No. 134,153, dated December24, 1872.

To all whom it may concern:

Be it known thatI, ELUAH W. MOFFATT, of Hyde Park, of the county ofNorfolk and State of Massachusetts, have invented a new and usefulImprovement in Loom-Picker Mechanism; and do hereby declare the same tobe fully described in the following specification and represented in theaccompanying drawing,.of which- Figure 1 denotes a top view; Fig. 2, afront elevation; and Fig. 3, a side view. of the pickerstaffoperative-cam heretofore in general use in looms for'weaving woolfabrics.

It is well known that such a cam is liable soon to become worn on therising part, or that against which the friction-roller strikes andascends, and that when too much worn the whole cam has to be removedfrom the rock-shaft and another substituted. To avoid this diflicnlty orloss occasioned by wear of the cam is the object of my invention, whichis shown in Figs. 4, 5, 6, and 7, of which Fig. 4 is a top view; Fig. 5,a front elevation; Fig.6, a side view; Fig. 7, a longitudinal section ofthe mechanism constituting such; Fig. 8 is a top view of the socketedpiece or cam-carrier; and Fig. 9, a rear-end view of the adjustablerotary polygonal cam.

In carrying out my invention I construct the mechanism in two principalparts, A B.. The part or'carrier B is the socketed piece which receivesthe rock-shaft, it going through it, or its socket a, formed as usualand being held to it by clamp-screws. This socketed piece or carrier Iprovide with a prismatic or pyramidal tenon, b, to enter and fit acorrespondin g hole, 0, or mortise made in or through the part A, which,instead of being a camv with but two operative sides, has three, four,or more it, as shown in the drawing, having four of them, marked 0 d ef. It is formed with a hub, g, to fit upon the tenon b, the two beingsecured together by a set-nut, h, and a screw, 2', formed on the tenon.The sides of the prismatic or pyramidal tenon correspond in number withthe number of working-faces of the polygonal cam, the same being so thatwhen one face may have become too much worn the cam may be turned andadjusted on the tenon so as to bring another of its faces into positionfor operation against the friction roller of the impinging arm.

I make no claim tothe picker-motion cam made as shown in Figs. 1, 2, and3.

What I claim as my invention is- The combination of the adjustable threeor more sided or polygonal cam A, socketed as described, with thecarrier B provided with the prismatic tenon, all being substantially asand for the purpose explained.

E. W. MOFFA'IT.

Witnesses:

. 'R. H. EDDY,

J. R. SNOW.

